Additive mixture for the bactericidal and anticorrosive additization of fuels
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsWolfgang Beilfuss, Ralf Gradtke, Jennifer Knopf, Ingo Krull
Life of this patent
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Abstract
An additive mixture for fuels including a) at least one N-formal, b) at least one antioxidant and c) at least one corrosion inhibitor. The additive mixture ensures that the additized fuels and lubricants have biocidal and corrosion-inhibiting additization, especially when they include proportions of renewable raw materials, such as biodiesel, and when they are in contact with copper-containing surfaces.
Claims13
An additive mixture for fuels as a liquid concentrate, consisting of:
- a) 92% by weight of N,N′-methylenebis (5-methyloxazolidine);
- b) 4% by weight of 2,6-di-tert-butylphenol as an antioxidant;
- and
- c) 4% by weight of N,N-bis(2-ethylhexyl) (1,2,4-triazol-1-ylmethyl)amine as a corrosion inhibitor.
A method for biocidal and corrosion-inhibiting additization of a fuel that flows through or is stored in a system comprising copper-containing material in contact with said fuel, comprising:
- adding to said fuel a liquid concentrate consisting of:
- a) N,N′-methylenebis (5-methyloxazolidine);
- b) an antioxidant selected from the group consisting of sterically hindered phenols, amines, vitamin E and derivatives thereof, alkyl gallates and mixtures thereof;
- and
- c) a corrosion inhibitor selected from the group consisting of benzotriazole, tolyltriazole, N,N-bis(2-ethylhexyl)(1,2,4-triazol-1-ylmethyl) amine and mixtures thereof,
- said antioxidant and said corrosion inhibitor being present in a weight ratio of 1:10 to 10:1, and for 100% of said concentrate, said antioxidant and said corrosion inhibitor are each at least 2% by weight,
- wherein corrosion of copper in a system through which the fuel flows or in which the fuel is stored is inhibited.
A fuel comprising at least 5 ppm of N,N′-methylenebis(5-methyloxazolidine);
- at least 0.25 ppm of an antioxidant comprising 2,6-di-tert-butylphenol and BHT
- at least 5 ppm a corrosion inhibitor selected from the group consisting of benzotriazole, tolyltriazole, N,N-bis(2-ethylhexyl) (1,2,4-triazol-1-ylmethyl)amine and mixtures thereof, and
- fatty acid methyl esters
- wherein said antioxidant and said corrosion inhibitor are present in a weight ratio of 1:10 to 10:1,
- wherein said fuel is selected from the group consisting of biofuels, biodiesels, diesel fuels, kerosenes, heavy oils, heating oils, and mineral oils.
Dependencies are inferred from the claim text.